Provable

Provable Markets is a New York and Amsterdam based financial technology firm operating Aurora, the first new SEC-registered Alternative Trading System (ATS) for securities finance in over a decade. Through Aurora Marketplace and Aurora Trade Manager, Provable delivers front-, middle-, and back-office technology for the securities lending market: automated trade matching, contract lifecycle management (returns, recalls, marks, rate changes), and CCP connectivity via NSCC. Its cloud-native platform exposes open APIs — a Connect/gRPC Aurora API, FIX specifications, and WebSocket/webhook event streams — and it is a FINRA member registered as an SEC ATS with SOC 2 and ISO 27001 certifications.

Provable publishes 1 API on the APIs.io network. Tagged areas include Company, Securities Lending, Capital Markets, Fintech, and Trading.

The Provable catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Provable’s developer surface includes documentation, API reference, support, engineering blog, authentication, changelog, and 14 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.1/100 developing ▬ flat Agent 30/100 agent aware Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessSelf serve

1 APIs 1 MCP Servers

CompanySecurities LendingCapital MarketsFintechTradingAlternative Trading SystemPost-TradegRPCFIX

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 40.1/100 · developing

Contract Quality 9.6 / 21

Developer Ergonomics 4.1 / 17

Access Clarity 4.9 / 17

Operational Transparency 2.6 / 11

Contract Governance 1.9 / 10

Discoverability 7.4 / 9

Regulatory Posture 9.5 / 15

Agent readiness — 30/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/provable: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Aurora API

The Aurora Connect (Buf) API for the SEC-registered securities-finance ATS — authentication, company/instrument reference, order management (OMS), venue order book, contract req...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

WellKnown

MCPServer

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Webhooks

Conformance

Lifecycle

DataModel

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Compliance

Compliance

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Blog

Blog

Source (apis.yml)

aid: provable
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/provable.png
name: Provable
description: 'Provable Markets is a New York and Amsterdam based financial technology firm operating Aurora, the first new
  SEC-registered Alternative Trading System (ATS) for securities finance in over a decade. Through Aurora Marketplace and
  Aurora Trade Manager, Provable delivers front-, middle-, and back-office technology for the securities lending market: automated
  trade matching, contract lifecycle management (returns, recalls, marks, rate changes), and CCP connectivity via NSCC. Its
  cloud-native platform exposes open APIs — a Connect/gRPC Aurora API, FIX specifications, and WebSocket/webhook event streams
  — and it is a FINRA member registered as an SEC ATS with SOC 2 and ISO 27001 certifications.'
url: https://raw.githubusercontent.com/api-evangelist/provable/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- anthemis
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Securities Lending
- Capital Markets
- Fintech
- Trading
- Alternative Trading System
- Post-Trade
- gRPC
- FIX
apis:
- name: Aurora API
  description: The Aurora Connect (Buf) API for the SEC-registered securities-finance ATS — authentication, company/instrument
    reference, order management (OMS), venue order book, contract requests, contract lifecycle (returns/recalls), executions,
    agreements, and server-initiated event streams over gRPC, gRPC-Web, and Connect-HTTP.
  humanURL: https://developer.provablemarkets.com
  baseURL: https://provablemarkets.com/api/1
  properties:
  - type: Documentation
    url: https://developer.provablemarkets.com/workflows
  - type: APIReference
    url: https://developer.provablemarkets.com/api/connectapi
  - type: GettingStarted
    url: https://developer.provablemarkets.com/workflows
common:
- type: DomainSecurity
  url: security/provable-domain-security.yml
- type: DeveloperPortal
  url: https://developer.provablemarkets.com
- type: Documentation
  url: https://developer.provablemarkets.com/workflows
- type: APIReference
  url: https://developer.provablemarkets.com/api/connectapi
- type: Support
  url: https://provablemarkets.com/contact
- type: Blog
  url: https://provablemarkets.com/news-insights
- type: TermsOfService
  url: https://provablemarkets.com/terms-conditions
- type: PrivacyPolicy
  url: https://provablemarkets.com/privacy-policy
- type: Compliance
  url: https://provablemarkets.com/
- type: LLMsTxt
  url: llms/provable-llms.txt
- type: WellKnown
  url: well-known/provable-well-known.yml
- type: Authentication
  url: authentication/provable-authentication.yml
- type: Conventions
  url: conventions/provable-conventions.yml
- type: Webhooks
  url: asyncapi/provable-events-webhooks.yml
- type: MCPServer
  url: mcp/provable-mcp.yml
- type: Conformance
  url: conformance/provable-conformance.yml
- type: Lifecycle
  url: lifecycle/provable-lifecycle.yml
- type: ChangeLog
  url: changelog/provable-changelog.yml
- type: DataModel
  url: data-model/provable-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 15
  pass: local-v1

Provable

Kin Score

APIs 1

Aurora API

MCP Servers 1

Provable MCP Server

Event Specifications 1

Provable Events Webhooks

Security Posture 2

Provable Authentication

Provable Domain Security

Resources